305743228473781 has 16 divisors (see below), whose sum is σ = 349592150476800. Its totient is φ = 261937139442480.

The previous prime is 305743228473773. The next prime is 305743228473797. The reversal of 305743228473781 is 187374822347503.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 305743228473781 - 2³ = 305743228473773 is a prime.

It is a super-2 number, since 2×305743228473781² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (305743228453781) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2079147600 + ... + 2079294646.

It is an arithmetic number, because the mean of its divisors is an integer number (21849509404800).

Almost surely, 2^{305743228473781} is an apocalyptic number.

It is an amenable number.

305743228473781 is a deficient number, since it is larger than the sum of its proper divisors (43848922003019).

305743228473781 is a wasteful number, since it uses less digits than its factorization.

305743228473781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290664.

The product of its (nonzero) digits is 189665280, while the sum is 64.

The spelling of 305743228473781 in words is "three hundred five trillion, seven hundred forty-three billion, two hundred twenty-eight million, four hundred seventy-three thousand, seven hundred eighty-one".